org.eclipse.scada.core

Class AttributesHelper

java.lang.Object

org.eclipse.scada.core.AttributesHelper

public class AttributesHelper
extends Object

Constructor Summary

Constructors

Constructor and Description
AttributesHelper()

Method Summary

Modifier and Type	Method and Description
static Map<String,Variant>	diff(Map<String,Variant> source, Map<String,Variant> target) Generate the difference between two maps
static void	mergeAttributes(Map<String,Variant> target, Map<String,Variant> change) merges the difference attributes into the target
static void	mergeAttributes(Map<String,Variant> target, Map<String,Variant> diff, boolean initial) merges the attribute differences.
static void	mergeAttributes(Map<String,Variant> target, Map<String,Variant> change, Map<String,Variant> diff) merges the difference attributes into the target
static void	set(Map<String,Variant> target, Map<String,Variant> attributes, Map<String,Variant> diff) update the target attributes to contain only the requested attributes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AttributesHelper

public AttributesHelper()

Method Detail

mergeAttributes

public static void mergeAttributes(Map<String,Variant> target,
                                   Map<String,Variant> change,
                                   Map<String,Variant> diff)

merges the difference attributes into the target

returns the real changes performed on target in diff

Parameters:

target - the attributes to merge the difference in

change - the attributes to change

diff - output of real changes that were made

mergeAttributes

public static void mergeAttributes(Map<String,Variant> target,
                                   Map<String,Variant> change)

merges the difference attributes into the target

Parameters:

target - the attributes to merge the difference in

change - the attributes to change

mergeAttributes

public static void mergeAttributes(Map<String,Variant> target,
                                   Map<String,Variant> diff,
                                   boolean initial)

merges the attribute differences. But respects the initial flag sent by many events. in the case the difference is flagged initial the target will be cleared first. This is a convenient method to easy the merge.

Parameters:

target - the attributes to merge the difference in

diff - the difference attributes

initial - initial flag

set

public static void set(Map<String,Variant> target,
                       Map<String,Variant> attributes,
                       Map<String,Variant> diff)

update the target attributes to contain only the requested attributes

Parameters:

target - the attributes to update the difference to

attributes - the new attributes set

diff - the actual difference

diff

public static Map<String,Variant> diff(Map<String,Variant> source,
                                       Map<String,Variant> target)

Generate the difference between two maps

Parameters:

source - the source map

target - the target map

Returns:

the difference